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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 47 (Exhaust System) >> Repair Instructions >> Exhaust Intermediate Underbody Heat Shield Replacement (LSY) >> Installation Procedure

Installation Procedure

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  1. GM5441362Courtesy of GENERAL MOTORS COMPANY

    Exhaust Intermediate Underbody Heat Shield (2) - Install

  2. CAUTION:

    Refer to Fastener Caution .

  3. Exhaust Heat Shield Bolt (1) - Install and tighten [6x] - Fastener Specifications 
  4. GM5309214Courtesy of GENERAL MOTORS COMPANY

    Catalytic Converter Gasket (2) - Install NEW

  5. Install the exhaust muffler (1) to the warm up three-way catalytic converter.
  6. GM5309188Courtesy of GENERAL MOTORS COMPANY

    Catalytic Converter Nut (1) - Install and tighten [2x] - Fastener Specifications 

  7. GM5400756Courtesy of GENERAL MOTORS COMPANY

    Floor Panel Reinforcement (2) - Install

  8. Floor Panel Number 4 Cross Bar Reinforcement Bolt (1) - Install and tighten [6x] - Fastener Specifications
  9. GM5400642Courtesy of GENERAL MOTORS COMPANY

    Underbody Rear Air Deflector-Right Side (5) - Install

  10. Underbody Rear Air Deflector Plastic Nut (3) - Install and tighten [3x] - Fastener Specifications
  11. Underbody Rear Air Deflector Bolt (2) - Install and tighten [3x] - Fastener Specifications
  12. Underbody Rear Air Deflector Nut (4) - Install and tighten [2x] - Fastener Specifications
  13. Rear Wheelhouse Liner Screw (1) - Install and tighten - Fastener Specifications
  14. GM5395705Courtesy of GENERAL MOTORS COMPANY

    Rear Tire Front Air Deflector-Right Side (2) - Install

  15. Rear Tire Front Air Deflector Bolt (1) - Install and tighten [2x] - Fastener Specifications
  16. GM5400553Courtesy of GENERAL MOTORS COMPANY

    Underbody Rear Air Deflector-Left Side (5) - Install

  17. Underbody Rear Air Deflector Plastic Nut (2) - Install and tighten [3x] - Fastener Specifications
  18. Underbody Rear Air Deflector Bolt (3) - Install and tighten [3x] - Fastener Specifications
  19. Underbody Rear Air Deflector Nut (4) - Install and tighten [2x] - Fastener Specifications
  20. Rear Wheelhouse Liner Screw (1) - Install and tighten - Fastener Specifications
  21. GM5395705Courtesy of GENERAL MOTORS COMPANY

    Rear Tire Front Air Deflector-Left Side (2) - Install

  22. Rear Tire Front Air Deflector Bolt (1) - Install and tighten [2x] - Fastener Specifications
  23. Lower the vehicle.
  24. Inspect the exhaust system for leaks.